The podcasts mentioned by Salgueiros (Philosopher's zone and Philosophy Bites) are both good. As for critical thinking from a humanist point of view, try The Skeptics Guide To The Universe ("Your escape—to reality."). Dr. Steven Novella and his band of skeptics go a long way toward teaching logical thinking and using logic to dispel much of the woo-woo thinking that is so ubiquitous in the media today. As a plus, James ("the Amazing") Randy is a frequent guest.

Right, I've got my work cut out for me know. I'm downloading sample episodes of everything mentioned. The Sceptics podcast wasn't really what I had in mind when I indicated I wanted a humanist angle, I just wanted to exclude a lot of, perfectly valid, viewpoints which ultimately look to a higher power for moral guidance. But damn, I do like James Randy.

How could I forget this one? The Point of Inquiry Podcast, which has ties to the Center For Inquiry (CFI). Here's a list of their most recent episodes:
* D.M. Murdock - The Christ Conspiracy
* Rick Perlstein - Is There a Republican War on History?
* Jean Mercer - Child Development: Myths and Misunderstandings
* Michael Shermer - The Believing Brain
* Scott Lohman - Star Trek and Humanism
* Jonathan Kay - Among the Truthers
* Robert Sheaffer - It’s a Conspiracy
* Chris Mooney - Accommodationism and the Psychology of Belief

It indexes all quality philosophy podcasts that exist (about 17 of them), and it categorizes them by area (mind, science, religion, continental, etc).

Thursday, Jan 17 2013 - 11:00 AM
IOT: Comets 17 Jan 13
Melvyn Bragg and his guests discuss comets, the 'dirty snowballs' of the Solar System. Halley's Comet is today the best known example of a comet, a body of ice and dust which orbits the Sun. Since they contain materials from the time when the Solar System was formed, comets are regarded by scientists as frozen time capsules, with the potential to reveal important information about the early history of planets. Melvyn Bragg is joined by Monica Grady, Professor of Planetary and Space Sciences at the Open University; Paul Murdin, Senior Fellow at the Institute of Astronomy at the University of Cambridge and Don Pollacco, Professor of Astronomy at the University of Warwick.

very apropos for a piece I'm working on. Thanks!
Not philosophy though.